bigcat instruments has released The Free Saxophone Collection featuring the Public Domain Iowa Alto and Soprano Saxophones for Kontakt 5, VSTi and Sampletank 2.5. Also included are The Club Saxophone series, Alto, Alto Jazz, Tenor and Baritone and the MSLP Sax for Kontakt 5 under Creative Commons licenses.

Note that the full version of Kontakt 5 version 5.3.1 is required to use the Kontakt instruments.